It all comes down to fluff. Subscribe and turn on notifications (🔔) so you don't miss any videos: http://goo.gl/0bsAjO Before each serve, most professional tennis players go through a ritual to get in the zone. Novak Djokovic will bounce the ball with his racket, then with his hand. Rafael Nadal will usually pull his shorts and the sleeves around his shoulders, then touch his nose and tuck his hair behind his ears. All very distinct routines. But there’s one tennis ritual nearly every pro tennis player does: choosing a specific tennis ball. A common belief among players is that the ball they choose can help them win. But there’s real physics at play behind this ritual — and It all comes down to the fuzz. For a faster serve, players try to find a compact ball. For a slower serve, they feel for more fuzz. The idea is that a fluffier ball is more likely to be slowed by drag as it travels through the air — and that choosing the right level of fuzz can help the serving player defeat their opponent. More information on the aerodynamics of sports balls: https://people.stfx.ca/smackenz/courses/HK474/Labs/Jump%20Float%20Lab/Mehta%201985%20Aerodynamics%20of%20sports%20balls.pdf Michael Kosta's podcast, Tennis Anyone: https://open.spotify.com/show/2ca3fTFmcoNgpQe6SD5XQa Subscribe to our channel! http://goo.gl/0bsAjO Vox.com is a news website that helps you cut through the noise and understand what's really driving the events in the headlines. Check out http://www.vox.com/. Watch our full video catalog: http://goo.gl/IZONyE Follow Vox on Facebook: http://goo.gl/U2g06o Or Twitter: http://goo.gl/XFrZ5H